メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.75614539658 43.1927421449296, 141.755610580713 43.1924861646453, 141.755529704236 43.1925446795511, 141.755198085297 43.1923667950554, 141.755823331598 43.1917178349499, 141.756737480289 43.1921704676407, 141.75614539658 43.1927421449296)) ^^http://www.opengis.net/ont/geosparql#wktLiteral